Engineering World Health Aspirator Client Dr John Webster

Engineering World Health: Aspirator Client: Dr. John Webster Advisor: Paul Thompson Team Lucas Vitzthum - Team Leader Fan Wu - BWIG Nick Harrison - Communications Tyler Lark - BSAC

Outline § § § § Problem Statement Background Existing Devices Design Specifications Design Ideas Design Matrix Future Work

Problem Statement § Medical Aspirator § 3 rd World Application § Limited power § Locally available parts/expertise § Inexpensive

Background Information § Remove mucus and other bodily fluids § Wide range of uses § § § Liposuction Nasal Gastric Dental Endocervical Pediatrics § Portable § Battery or AC

Current Devices Brands Problems §Gomco (Allied §Expensive §Specialized §Not locally Medical) §Res-Q-Vac §Apria §Many! repairable

Design Specifications § § § Locally available materials <$100 Autoclavable suction tips Vacuum pressure: 0 – 550 mm. Hg Flow rate: 0 – 30 Lpm Sterile and safe

General Setup § § § Autoclavable tip Collection chamber Vacuum source

Water Hourglass § Water flow from top to bottom § Venturi effect § 360 degree rotation

Pros and Cons § Pros § Simple setup § Parts easily obtainable § Water available in 3 rd world hospitals § Inexpensive § Cons § Weak vacuum § Obstructs operating room environment

Foot Pump § Mechanical § Human powered § Pair of one-way valves § Two-stage system § Compression § Restitution

Foot Pump § Advantages: § Inexpensive § Man-powered (Independent of electricity) § Easily replaceable § Disadvantages: § Weak vacuum § Inconsistent airflow § Physically demanding

Electric Vacuum Pump Design § Salvaged Electric Motor § Conversion to linear ossilations § Contractions of Diaphram § One way valves § 12 V car battery

Vacuum Pump (cont. ) § Pros § Reliable, continuous vacuum § Versatile § Cons § Complicated design § Difficult to build

Design Matrix Power Availability (10) Foot Water Pump Hourglass 7 8 Electric Pump 4 Construction Resources 9 (10) 7 5 Pressure (10) 2 4 9 Hospital integration (5) 4 2 4 Reliability/ Safety (10) 1 5 28 5 4 30 8 3 33 Cost (5) Total

Future Work § § § Design an airflow control Finalized design Acquire materials for a prototype Build Test

Any Questions?